In 1958, Larry Ganem is one of the members of the chapter of the Men of Letters in Normal, Illinois. Abaddon massacres the Illinois chapter while trying to obtain the key to the Men of Letters Bunker, which he gives the key to Henry Winchester for safe keeping.
Henry uses magic to create a portal which takes him to the year 2013, unknowingly followed by Abaddon. Henry finds Sam and Dean and they manage to find Larry Ganem still alive in Lebanon, Kansas. He gives them the coordinates to the bunker but he pleads with Sam to lock the key inside the bunker to prevent Abaddon gaining access to the knowledge kept there. Abbadon kills him and takes Sam hostage. In an exchange with Dean for the Key, Henry is killed but Abaddon is defeated.
The Winchesters have possession of the key and they find the Men of Letters Bunker and move in, taking on their roles as Legacies and continuing the work of the order, using the Bunker's resources to aid in their own fight against evil.
Sam and Dean hunt down a banshee that has been causing the residents of a retirement home called Oak Park to kill them selves. The home is 15 minutes from the bunker.